The typical monthly cost for 1 website is in the range of 700 euros to 2,400 Euros. The exact cost depends on the billing cycle (monthly, quarterly, yearly, or multiple years). The longer the commitment and the upfront payment period, the lower the monthly cost. Other parameters that affect the price per website are the number of websites, number of support hours included, number of users, number of monthly sessions, whether extra security features are required and the required SLA.
There is also typical one-time setup fee of 500-1000 Euros for 1 website, depending on website size and effort needed.